brakes TOYOTA SIENNA HYBRID 2023 Owners Manual

431-1. For safe use
1
For safety and security
Side impact sensors (rear)
Driver’s seat belt buckle switch
Driver’s seat position sensor
Driver airbag
Front passenger occupant classification sensors
Driver’s knee airbag
SRS warning light
Airbag sensor assembly
Your vehicle is equipped with ADVANCED AIRBAGS designed
based on the US motor vehicle safety standards (FMVSS208). The
airbag sensor assembly (ECU) cont rols airbag deployment based on
information obtained from the sensors etc. shown in the system
components diagram above. This in formation includes crash sever-
ity and occupant information. As the airbags deploy, a chemical
reaction in the inflators quickly fills the airbags with non-toxic gas to
help restrain the motion of the occupants.
■If the SRS airbags deploy
(inflate)
●Slight abrasions, burns, bruising
etc., may be sustained from SRS
airbags, due to the extremely high
speed deployment (inflation) by
hot gases.
●A loud noise and white powder will
be emitted.
●Parts of the airbag module (steer-
ing wheel hub, airbag cover and
inflator) as well as the front seats,
parts of the front and rear pillars,
and roof side rails, may be hot for
several minutes. T he airbag itself
may also be hot.
●The windshield may crack.
●The hybrid system will be stopped
and fuel supply to the engine will
be stopped. ( P.86)
●All of the doors will be unlocked.
( P.134)
●The brakes and st op lights will be
controlled automatically. (
 P.336)
●The interior lights will turn on auto-
matically. ( P.365)
●The emergency flashers will turn
on automatically. ( P.456)
●For Safety Connect subscribers, if
any of the following situations
occur, the system is designed to
send an emergency call to the
response center, notifying them of
the vehicle’s location (without
needing to push the “SOS” button)
and an agent will attempt to speak
with the occupants to ascertain
the level of emergency and assis-
tance required. If the occupants
are unable to communicate, the
agent automatically treats the call
as an emergency and helps to dis-
patch the necessary emergency
services. ( P.75)
• An SRS airbag is deployed.
• A seat belt pretensioner is acti- vated.
• The vehicle is involved in a severe rear-end collision.
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1483-2. Opening, closing and locking the doors
The power sliding door system
can be enabled/disabled by
using the power sliding door
NOTICE
●Take care not to damage the
sensors (installed on the front
edge of the power sliding door)
with a knife or other sharp
object.
●Make sure there is nothing in
the doorway before closing.
●Do not close the sliding door by
applying the brakes. Doing so
could cause the sliding door to
be damaged.
■Hands Free Power Sliding
Doors precautions (if
equipped)
The kick sensors are located
behind the portions with labels on
the rocker mouldings. Observe
the following to e nsure that the
Hands Free Power Sliding Door
function operates properly:
●Keep the portions with labels on
the rocker mouldings clean at all
times.
If the portions with labels on the
rocker mouldings are dirty or
covered with snow or mud, the
kick sensors may not operate.
In this situation, clean off the dirt
or snow, move the vehicle from
the current posi tion and then
check if the ki ck sensors oper-
ate.
If they do not o perate, have the
vehicle inspected by your
Toyota dealer.
●Do not apply coatings that have
a rain cleari ng (hydrophilic)
effect, or other coatings, to the
portions with labels on the
rocker mouldings.
●Do not park the vehicle near
objects that may move and con-
tact portions with labels on the
rocker mouldings, such as
grass or trees.
If the vehicle has been parked
for a while near objects that
may move and contact the por-
tions with labels on the rocker
mouldings, such as grass or
trees, the kick sensors may not
operate. In this situation, move
the vehicle from the current
position and the n check if the
kick sensors operate. If they do
not operate, have the vehicle
inspected by your Toyota
dealer.
●Do not subject the kick sensors
or their surrounding areas to a
strong impact.
If the kick sensors or their sur-
rounding areas have been sub-
jected to a strong impact, the
kick sensors may not operate
properly. If the kick sensors do
not operate in the following situ-
ations, have the vehicle
inspected by your Toyota
dealer.
• The kick sensors or their sur- rounding areas have been sub-
jected to a strong impact.
• The portions with labels on the rocker mouldings are scratched
or damaged.
●Do not disassemble the rocker
mouldings.
●Do not attach an accessory con-
taining metal or apply metallic
paint to the rocker mouldings.
Canceling the power slid-
ing door system

2114-1. Before driving
4
Driving
up, and the road could be slip-
pery.
●Drive carefully when it starts to
rain, as the road surface could be
especially slippery.
●Refrain from high speeds when
driving on an expressway in the
rain, because there may be a
layer of water between the tires
and the road surface, preventing
the steering and brakes from
operating properly.
■ECO Accelerator Guidance
(  P.108)
It is easier to drive in an Eco-friendly
manner by driving while referring to
the ECO Accelerator Guidance dis-
play. Also, by using the ECO Accel-
erator Guidance it is easier to
increase the “Eco Score” evaluation.
●When starting off:
While staying within the ECO
Accelerator Guidance range,
gradually depress the accelerator
pedal and accelerate to the
desired speed. If excessive accel-
eration is avoid ed, the “Start”
score will increase.
●When driving:
After accelerating to the desired
speed, release the accelerator
pedal and drive at a stable speed
within the ECO Acce lerator Guid-
ance range. By keeping the vehi-
cle within the E CO Accelerator
Guidance range, the “Cruise”
score will increase.
●When stopping:
When stopping the vehicle, early
releasing the accelerator pedal
will cause the “Stop” score to
increase.
■Restraining the hybrid system
output (Brake Override System)
●When the accelerator and brake
pedals are depressed at the same
time, the hybrid system output
may be restrained.
●A warning message is displayed
on the multi-information display and head-up display (if equipped)
while the system is operating.
(
 P.469)
■Restraining sudden start (Drive-
Start Control)
●When the following unusual oper-
ation is performed, the hybrid sys-
tem output may b e restrained.
• When the shift lever is shifted from
R to D, D to R, N to R, P to D
*, or
P to R* (D includes S) with the
accelerator pedal depressed, a
warning message appears on the
multi-information display and
head-up display (i f equipped). If a
warning message is shown on the
multi-information display and
head-up display (if equipped),
read the message and follow the
instructions.
• When the accelerator pedal is
depressed too much while the
vehicle is in reverse.
*: Depending on the situation, the
shift position may not be changed.
●When the TRAC is turned off
( P.337), sudden start restraint
control also does not operate. If
your vehicle have trouble escap-
ing from the mud or fresh snow
due to the sudden start restraint
control operation, deactivate
TRAC ( P.337) so that the vehi-
cle may become able to escape
from the mud o r fresh snow.
■Breaking in your new Toyota
To extend the life of the vehicle,
observing the following precautions
is recommended:
●For the first 200 miles (300 km):
Avoid sudden stops.
●For the first 500 miles (800 km):
Do not tow a trailer.
●For the first 600 miles (1000 km):
• Do not drive at extremely high
speeds.
• Avoid sudden acceleration.
• Do not drive continuously in low gears.

2124-1. Before driving
• Do not drive at a constant speed for extended periods.
■Operating your vehicle in a for-
eign country
Comply with the relevant vehicle
registration laws and confirm the
availability of the correct fuel.
(  P.518)
WARNING
Observe the following precau-
tions.
Failure to do so m ay result in
death or serious injury.
■When starting the vehicle
Always keep your foot on the
brake pedal while stopped with
the “READY” indicator is illumi-
nated. This prevents the vehicle
from creeping.
■When driving the vehicle
●Do not drive if y ou are unfamil-
iar with the location of the brake
and accelerator pedals to avoid
depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the
brake pedal will result in sudden
acceleration that may lead to an
accident.
• When backing up, you may twist your body around, leading to a
difficulty in operating the pedals.
Make sure to operate the pedals
properly.
• Make sure to keep a correct driving posture even when mov-
ing the vehicle only slightly. This
allows you to depress the brake
and accelerator pedals properly.
• Depress the brake pedal using your right foot. Depressing the
brake pedal using your left foot
may delay respon se in an emer-
gency, resulting in an accident.
●The driver should pay extra
attention to pedestrians when
the vehicle is powered only by
the electric motor (traction
motor). As there is no engine
noise, the pedestrians may mis-
judge the vehicle’s movement.
Even though the vehicle is
equipped with the Acoustic
Vehicle Alerting System, drive
with care as pedestrians in the
vicinity may still not notice the
vehicle if the surrounding area
is noisy.
●Do not drive the vehicle over or
stop the vehicle near flammable
materials such as leaves, paper
or rags.
The exhaust system and
exhaust gases can be
extremely hot. These hot parts
may cause a fire i f there is any
flammable material nearby.
●During normal driving, do not
turn off the hybrid system. Turn-
ing the hybrid s ystem off while
driving will not cause loss of
steering or braking control, how-
ever, power assist to the steer-
ing will be lost. This will make it
more difficult to steer smoothly,
so you should pull over and stop
the vehicle as soon as it is safe
to do so. In the event of an
emergency, such as if it
becomes impossible to stop the
vehicle in the normal way:
 P.457
●Use engine braking (downshift)
to maintain a safe speed when
driving down a steep hill.
Using the brakes continuously
may cause the brakes to over-
heat and lose effectiveness.
( P.241)

2134-1. Before driving
4
Driving
WARNING
●Do not adjust the position of the
steering wheel, the seat, or the
inside or outside rear view mir-
rors while driving.
Doing so may result in a loss of
vehicle control.
●Always check that all passen-
gers’ arms, head or other parts
of their body are not outside the
vehicle.
●AWD models: Do not drive the
vehicle off-road. This is not an
AWD vehicle designed for off-
road driving. Drive with due care
if it becomes unavoidable to
drive off-road.
●AWD models: Do not drive
across a river or through other
bodies of water. This may cause
electric/electronic components
to short circuit, damage the
engine or cause other serious
damage to the vehicle.
●Do not drive in excess of the
speed limit. Even if the legal
speed limit permits it, do not
drive over 85 mph (140 km/h)
unless your vehicle has high-
speed capability tires. Driving
over 85 mph (140 km/h) may
result in tire failure, loss of con-
trol and possible injury. Be sure
to consult a tire dealer to deter-
mine whether the tires on your
vehicle are high-speed capabil-
ity tires or not b efore driving at
such speeds.
■When driving on slippery
road surfaces
●Sudden braking, acceleration
and steering may cause tire
slippage and reduce your ability
to control the vehicle.
●Sudden acceleration, engine
braking due to shifting, or
changes in engine speed could
cause the vehicle to skid.
●After driving through a puddle,
lightly depress the brake pedal
to make sure that the brakes
are functioning properly. Wet
brake pads may prevent the
brakes from functioning prop-
erly. If the brakes on only one
side are wet and not functioning
properly, steering control may
be affected.
■When shifting the shift lever
●Do not let the vehicle roll back-
ward while a fo rward driving
position is selected, or roll for-
ward while the shift lever is in R.
Doing so may result in an acci-
dent or damage to the vehicle.
●Do not shift the shift lever to P
while the vehicle is moving.
Doing so can damage the trans-
mission and may result in a loss
of vehicle control.
●Do not shift the sh ift lever to R
while the vehicle is moving for-
ward.
Doing so can damage the trans-
mission and may result in a loss
of vehicle control.
●Do not shift the shift lever to a
driving position while the vehicle
is moving backward.
Doing so can damage the trans-
mission and may result in a loss
of vehicle control.
●Moving the shift lever to N while
the vehicle is moving will disen-
gage the hybrid system. Engine
braking is not a vailable with the
hybrid system disengaged.

2154-1. Before driving
4
Driving
WARNING
●Do not leave a door or window
open if the curved glass is
coated with a metallized film
such as a silver-colored one.
Reflected sunlight may cause
the glass to act as a lens, caus-
ing a fire.
●Always apply the parking brake,
shift the shift lever to P, stop the
hybrid system and lock the vehi-
cle.
Do not leave the vehicle unat-
tended while the “READY” indi-
cator is illuminated.
If the vehicle is parked with the
shift lever in P but the parking
brake is not set, the vehicle may
start to move, possibly leading
to an accident.
●Do not touch the exhaust pipes
while the “READY” indicator is
illuminated or immediately after
turning the hybrid system off.
Doing so may cause burns.
■When taking a nap in the
vehicle
Always turn the hybrid system off.
Otherwise, if you accidentally
move the shift lever or depress
the accelerator pedal, this could
cause an accident or fire due to
hybrid system overheating. Addi-
tionally, if the vehicle is parked in
a poorly ventilated area, exhaust
gases may collect and enter the
vehicle, leading to death or a seri-
ous health hazard.
■When braking
●When the brakes a re wet, drive
more cautiously.
Braking distance increases
when the brakes are wet, and
this may cause one side of the
vehicle to brake differently than
the other side. Also, the parking
brake may not securely hold the
vehicle.
●If the electronically controlled
brake system does not operate,
do not follow other vehicles
closely and avoid hills or sharp
turns that require braking.
In this case, braking is still pos-
sible, but the brake pedal
should be depressed more
firmly than usual. Also, the brak-
ing distance will increase. Have
your brakes fixed immediately.
●The brake system consists of 2
or more individual hydraulic sys-
tems; if one of the systems fails,
the other will still operate. In this
case, the brake pedal should be
depressed more firmly than
usual and the braking distance
will increase. Have your brakes
fixed immediately.
■If the vehicle becomes stuck
(AWD models)
Do not spin the wheels exces-
sively when any of the tires is up
in the air, or the vehicle is stuck in
sand, mud, etc. This may damage
the driveline components or pro-
pel the vehicle forward or back-
ward, causing an accident.
NOTICE
■When driving the vehicle
●Do not depress the accelerator
and brake pedals at the same
time during driving, as this may
restrain the hybrid system out-
put.
●Do not use the accelerator
pedal or depress the accelera-
tor and brake pedals at the
same time to hold the vehicle on
a hill.

2224-1. Before driving
■Before towing
Check that the fo llowing conditions
are met:
●Ensure that your vehicle’s tires
are properly inflated. ( P.523)
●Trailer tires are inflated according
to the trailer manufacturer’s rec-
ommendation.
●All trailer lights work as required
by law.
●All lights work each time you con-
nect them.
●The trailer ball is set at the proper
height for the coupler on the
trailer.
●The trailer is level when it is
hitched.
Do not drive if th e trailer is not
level, and check for improper
tongue weight, overloading, worn
suspension, or other possible
causes.
●The trailer cargo is securely
loaded.
●The rear view mirr ors conform to
all applicable fede ral, state/provin-
cial or local regulations. If they do
not, install rear view mirrors
appropriate for towing purposes.
■When towing a trailer
Disable the following systems, as
the systems may no t operate prop-
erly.
●LTA (Lane Tracing Assist)
(  P.278)
Trailer towing (with
towing package)
Your vehicle is designed
primarily as a passenger-
and-load-carrying vehicle.
Towing a trailer can have an
adverse impact on handling,
performance, braking, dura-
bility, and fuel consump-
tion. For your safety and the
safety of others, you must
not overload your vehicle or
trailer. You must also
ensure that you are using
appropriate towing equip-
ment, that the towing equip-
ment has been installed
correctly and used properly,
and that you employ the
requisite driving habits.
Vehicle-trailer stability and
braking performance are
affected by trailer stability,
brake performance and set-
ting, trailer brakes, the hitch
and hitch systems (if
equipped).
To tow a trailer safely, use
extreme care and drive the
vehicle in accordance with
your trailer’s characteris-
tics and operating condi-
tions.
Toyota warranties do not
apply to damage or mal-
function caused by towing a
trailer for commercial pur-
poses.
Contact your Toyota dealer for
further information about addi-
tional requirements such as a
towing kit, etc.

2234-1. Before driving
4
Driving
●Dynamic radar cruise control with
full-speed range (P.291)
●PKSB (Parking Support Brake) (if
equipped) ( P.324)
●BSM (Blind Spot Monitor) (if
equipped) ( P.302)
●Intuitive parking assist (if
equipped) ( P.312)
●RCTA (Rear Cross Traffic Alert)
function (if equipped) ( P.308)
●RCD (Rear Camera Detection)
function (if equipped) ( P.320)
WARNING
■Trailer towing precautions
To tow a traile r safely, use
extreme care and drive the vehi-
cle in accordance with the trailer’s
characteristics and operating con-
ditions. Failure to do so could
cause an accident resulting in
death or serious injury. Vehicle
stability and braking performance
are affected by trailer stability,
brake setting and performance,
and the hitch. Your vehicle will
handle differently when towing a
trailer.
■To avoid accident or injury
●Do not exceed the TWR,
unbraked TWR, GCWR, GVWR
or GAWR.
●Vehicles without spare tire: Do
not tow a trailer when the tire
installed is re paired with the
emergency tire puncture repair
kit.
●If the gross trailer weight is over
2000 lb. (907 kg), a sway con-
trol device with sufficient capac-
ity is required.
●Adjust the tongue weight within
the appropriate range. Place
heavier loads as close to the
trailer axle as possible.
●Do not exceed 65 mph (104
km/h), the posted towing speed
limit or the spee d limit for your
trailer as set forth in your trailer
owner’s manual, whichever is
lowest. Slow down sufficiently
before making a turn, in cross
winds, on wet or slippery sur-
face, etc. to help avoid an acci-
dent. If you experience a
vehicle-trailer instability from
reducing a certain speed, slow
down and make sure you keep
your vehicle speed under the
speed of which you experience
the instability.
●Do not make jer ky, abrupt or
sharp turns.
●Do not apply the brakes sud-
denly as you may skid, resulting
in jackknifing and loss of vehicle
control. This is especially true
on wet or slippery surfaces.
●Do not exceed the trailer hitch
assembly weight, gross vehicle
weight, gross axle weight and
trailer tongue w eight capacities.
●Do not use dynamic radar
cruise control with full-speed
range when towing.
●Slow down and downshift
before descending steep or long
downhill grades. Do not make
sudden downshifts while
descending steep or long down-
hill grades.

2244-1. Before driving
■GCWR (Gross Combination
Weight Rating)
The maximum allowable gross
combination weight. The gross
combination weight is the sum
of the total vehicle weight
(including the occupants, cargo
and any optional equipment
installed on the vehicle) and the
weight of the trailer being towed
(including the cargo in the
trailer).
■GVWR (Gross Vehicle
Weight Rating)
The maximum allowable gross
vehicle weight. The gross vehi-
cle weight is the total weight of
the vehicle. When towing a
trailer, it is the sum of the vehi-
cle weight (including the occu-
pants, cargo and any optional
equipment installed on the vehi-
cle) and the tongue weight.
WARNING
●Vehicle-trailer instability is more
likely on steep long downhills.
Before descending steep or
long downhill grades, slow
down and downshift. Do not
make sudden downshifts when
descending steep or long down-
hill grades. Avoid holding the
brake pedal down too long or
applying the brakes too fre-
quently. This could cause the
brakes to overheat and result in
reduced braking efficiency.
●Vehicles with compact spare
tire: Do not tow a trailer when
the compact spare tire is
installed on your vehicle.
■When towing a trailer
Toyota recommends trailers with
brakes that confor m to any appli-
cable federal and state/provincial
regulations.
●If the gross trailer weight
exceeds unbraked TWR, trailer
brakes are required. Toyota rec-
ommends trailers with brakes
that conform to all applicable
federal and state/provincial reg-
ulations.
●Never tap into y our vehicle’s
hydraulic system, as this will
lower the vehicle’s braking
effectiveness.
●Never tow a trailer without using
a safety chain securely attached
to both the traile r and the vehi-
cle. If damage occurs to the
coupling unit or hitch ball, there
is danger of the trailer wander-
ing into another lane.
Towing related terms

2254-1. Before driving
4
Driving
■GAWR (Gross Axle Weight
Rating)
The maximum allowable gross
axle weight. The gross axle
weight is the load placed on
each axle (front and rear).
Front GAWR
Rear GAWR
■TWR (Trailer Weight Rating)
The maximum allowable gross
trailer weight. The gross trailer
weight is the sum of the trailer
weight and the weight of the
cargo in the trailer.
TWR is calculated assuming
base vehicle with one driver,
one front passenger, hitch and hitch systems (if required).
Additional optional equipment, pas-
sengers and cargo in the vehicle
will reduce the trailer weight rating
so as not to exceed GCWR, GVWR
and GAWR.
If the gross traile
r weight exceeds
3000 lb. (1360 kg ), it is recom-
mended to use a trailer with 2 or
more axles.
(With brakes)
■Unbraked TWR (Unbraked
Trailer Weight Rating)
The trailer weight rating for tow-
ing a trailer without a trailer ser-
vice brake system.
(Without brakes)
■Tongue Weight
The load placed on the trailer
hitch ball. ( P.227)
A
B
A
A